Zobrazeno 1 - 8
of 8
pro vyhledávání: '"D. M. Fegredo"'
Publikováno v:
Canadian Metallurgical Quarterly. 28:67-74
Shatter cracks form in hot-rolled rail steels when hydrogen atoms diffuse into sinks, change to molecular hydrogen gas and exceed a critical pressure. Cracking can occur at temperatures below 200°C. Hydrogen degassing to “safe” levels, i.e. belo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::464f52423bcbde10a2901eb46ac60e47
https://doi.org/10.1179/cmq.1989.28.1.67
https://doi.org/10.1179/cmq.1989.28.1.67
Autor:
E. E. Laufer, D. M. Fegredo
Publikováno v:
Canadian Metallurgical Quarterly. 22:193-203
Experimental eutectoid rail steels with various thermal histories and containing Nb and/or V were examined by TEM to characterize precipitate size and distribution and to determine pearlite interlamellar spacing. Existing equations were used to calcu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcdc85c58a14d90debe1e2c8895c02f1
https://doi.org/10.1179/cmq.1983.22.2.193
https://doi.org/10.1179/cmq.1983.22.2.193
Publikováno v:
Canadian Metallurgical Quarterly. 22:453-473
Current alloy premium rail chemistries have a relatively high hardenability which leads to welding problems. However, premium rails with a hardness of ∼Rc 38 are necessary in Canada because the high wear rate of standard C- Mn rails is inadequate o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3683e83dfd38f29ca9fe1a03509c7290
https://doi.org/10.1179/cmq.1983.22.4.453
https://doi.org/10.1179/cmq.1983.22.4.453
Autor:
D. M. Fegredo
Publikováno v:
Metals Technology. 4:417-424
High-volume water sprays and air-water mixtures have been used to shorten the holdperiod(HP) in the two-stage rolling of 0.08%Nb, 0.02%Nb, and 0.09%Ti steels. The effects of gentler diffuse sprays were also roughly determined. Highvolume sprays creat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5a482bb9760e48be6d77daff7b30358
https://doi.org/10.1179/030716977803292790
https://doi.org/10.1179/030716977803292790
Publikováno v:
Canadian Metallurgical Quarterly. 22:205-210
In the investigation of candidate eutectoid steels for premium rails, pearlitic and bainitic microstructures of end-quench specimens from some rolled plates contain white martensitic streaks. The number of streaks is enhanced by the presence of molyb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e1100472bbd35b378e412b339a59409
https://doi.org/10.1179/cmq.1983.22.2.205
https://doi.org/10.1179/cmq.1983.22.2.205
Autor:
D. M. Fegredo
Publikováno v:
Metallurgical Transactions. 3:1943-1949
Pure polycrystalline zinc specimens of varying grain size and pronounced texture were fatigued at different temperatures from 125°C (Tm = 0.57) to −196°C (Tm = 0.11). Conventional S/N curves were obtained under temperature and grain size conditio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbd51a46436da012b3768bcd6218bc39
https://doi.org/10.1007/bf02642583
https://doi.org/10.1007/bf02642583
Autor:
D. M. Fegredo, R. C. A. Thurston
Publikováno v:
Canadian Metallurgical Quarterly. 5:273-314
Standard Oil Development type tests have been carried out on a mild steel which had received various thermo-mechanical treatments. The ductile-brittle transition temperature, dbtt, has been defined on a Go-No Go basis, and the varying transition temp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::852fa4ede9e4eedbbf5370037bf9c793
https://doi.org/10.1179/cmq.1966.5.4.273
https://doi.org/10.1179/cmq.1966.5.4.273
Autor:
D. M. Fegredo
Publikováno v:
Canadian Metallurgical Quarterly. 12:487-496
The tensile and fatigue properties of rods which were extruded from Zn-ZnO powder composites were determined at temperatures between 150°C and −196°C. Different particle sizes were used in the powders and the amount of 02 was varied from 0.12 to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e40a11fe9f986d6dd61bf74424019fc
https://doi.org/10.1179/cmq.1973.12.4.487
https://doi.org/10.1179/cmq.1973.12.4.487